Wacom drawing tablets require both a USB port and an HDMI port to run both the touch input and display, has anyone tried plugging a their drawing tablet into the 2015 MacBook (or another USB-C supported computer) using this adapter? If so, did you note any issue with performance, input lag, etc.?

MacBook Air has one mini port and two USB ports.
Into the mini port I do have connected one 22" LG screen.
I want to connect a second 22" LG screen.
Will the USB-C Digital AV Multiport adapter work in the MacBook Air?

I want a simple solution for travelling. Ideally I'd have a single mains adapter with a MacBook USB-C charger socket and a USB charging socket so I can charge both MacBook and iPhone at the same time, using a single socket (say, on a plane). Apple do not do one (although Plugbug have something almost as good).

The question therefore is: If I connect the MacBook charger to this USB-C Digital AV Multiport Adapter and through it on to the MacBook, and I use a usb/lightning lead to my iPhone, can I simultaneously charge both items?

USB-A to to DisplayPort adapter cables are now available, but the only thing standing in the way of using a mix of third-party solutions to connect the new USB-C Macbook to a DisplayPort external display is the lack of a splitter cable. In other words, you can connect to USB-A devices and DisplayPort-enabled displays from the single USB-C port, but you can't charge the laptop at the same time. If this accessory passes-through the DisplayPort signal to the USB-A port, then the Startech USB-A to DisplayPort adapter cable would enable simultaneous external display and charging.